大约有 40,000 项符合查询结果（耗时：0.0498秒） [XML]
How does grep run so fast?
...omparison
# (everything is in the buffer cache)
$ time grep -c 'tg=f_c' 20140910.log
28
0.168u 0.068s 0:00.26
$ time grep -c ' /cc/merchant.json tg=f_c' 20140910.log
28
0.100u 0.056s 0:00.17
The longer form is 35% faster!
How come? Boyer-Moore consructs a skip-forward table from the pattern-st...
Check a collection size with JSTL
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<c:if test="${companies.size() > 0}">
</c:if>
This syntax works only in EL 2.2 or newer (Servlet 3.0 / JSP 2.2 or newer). If you're facing a XML parsing error because you're using JSPX or Facelets instead of JSP, then use gt instead of >.
<c...
How to get a substring of text?
I have text with length ~700. How do I get only ~30 of its first characters?
5 Answers
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python numpy ValueError: operands could not be broadcast together with shapes
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user2357112 supports Monica
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answered Jul 3 '14 at 22:08
DrVDrV
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How can you debug a CORS request with cURL?
...successful, these headers shouldn't appear, or the HTTP response won't be 200.
You can also specify additional headers, such as User-Agent, by using the -H flag.
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Is there an alternative to string.Replace that is case-insensitive?
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From MSDN
$0 - "Substitutes the last substring matched by group number number (decimal)."
In .NET Regular expressions group 0 is always the entire match. For a literal $ you need to
string value = Regex.Replace("%PolicyAmount%", "%Pol...
How to set transform origin in SVG
...lem is, by default, it always applies the transform around the origin at (0, 0) – top left.
6 Answers
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What is the difference between 'log' and 'symlog'?
...de
pyplot.ion()
# Draw the grid lines
pyplot.grid(True)
# Numbers from -50 to 50, with 0.1 as step
xdomain = numpy.arange(-50,50, 0.1)
# Plots a simple linear function 'f(x) = x'
pyplot.plot(xdomain, xdomain)
# Plots 'sin(x)'
pyplot.plot(xdomain, numpy.sin(xdomain))
# 'linear' is the default mod...
Get and set position with jQuery .offset()
... |
edited Apr 7 '17 at 6:04
pstanton
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answ...
Check if a string contains another string
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390
Use the Instr function
Dim pos As Integer
pos = InStr("find the comma, in the string", ",")
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